Characterization of Addressability by Simultaneous Randomized Benchmarking

Jay M. Gambetta, A. D. Córcoles, S. T. Merkel, B. R. Johnson, John A. Smolin, Jerry M. Chow, Colm A. Ryan, Chad Rigetti, S. Poletto, Thomas A. Ohki, Mark B. Ketchen, and M. Steffen
Phys. Rev. Lett. 109, 240504 – Published 11 December 2012
PDFHTMLExport Citation

Abstract

The control and handling of errors arising from cross talk and unwanted interactions in multiqubit systems is an important issue in quantum information processing architectures. We introduce a benchmarking protocol that provides information about the amount of addressability present in the system and implement it on coupled superconducting qubits. The protocol consists of randomized benchmarking experiments run both individually and simultaneously on pairs of qubits. A relevant figure of merit for the addressability is then related to the differences in the measured average gate fidelities in the two experiments. We present results from two similar samples with differing cross talk and unwanted qubit-qubit interactions. The results agree with predictions based on simple models of the classical cross talk and Stark shifts.

  • Figure
  • Figure
  • Received 4 May 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.240504

© 2012 American Physical Society

Authors & Affiliations

Jay M. Gambetta1, A. D. Córcoles1, S. T. Merkel1, B. R. Johnson2, John A. Smolin1, Jerry M. Chow1, Colm A. Ryan2, Chad Rigetti1, S. Poletto1, Thomas A. Ohki2, Mark B. Ketchen1, and M. Steffen1

  • 1IBM T. J. Watson Research Center, Yorktown Heights, New York 10598, USA
  • 2Raytheon BBN Technologies, Cambridge, Massachusetts 02138, USA

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 109, Iss. 24 — 14 December 2012

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×